CN109899191A - A kind of automobile-used sound insulation and noise reduction intake manifold assembly based on kangaroo tail - Google Patents
A kind of automobile-used sound insulation and noise reduction intake manifold assembly based on kangaroo tail Download PDFInfo
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- CN109899191A CN109899191A CN201910250247.1A CN201910250247A CN109899191A CN 109899191 A CN109899191 A CN 109899191A CN 201910250247 A CN201910250247 A CN 201910250247A CN 109899191 A CN109899191 A CN 109899191A
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Abstract
The invention discloses a kind of automobile-used sound insulation and noise reduction intake manifold assembly based on kangaroo tail, including inlet manifold and pressure-stabilizing bin, the inlet end of the inlet manifold and outlet side bionical kangaroo tail front-end and back-end cross section curve profile are provided with sound insulation and noise reduction cavity up and down in the exhaust manifold wall；Bionical kangaroo tail obtains elliptic contour equation, and the whole story both ends diameter for obtaining kangaroo tail differs, and diameter change from the coarse to fine, therefore obtains the overall structure of exhaust manifold, the exhaust manifold absorbing of this structure, antivibration, moulding streamline, and air inlet is smooth；It is provided with sound insulation and noise reduction cavity up and down in exhaust manifold, reduces the noise of exhaust manifold, has perfectly reached the function of sound insulation and noise reduction.
Description
Technical field
It is especially a kind of based on the automobile-used of kangaroo tail the present invention relates to automobile-used sound insulation and noise reduction, antidetonation, energy-absorbing inlet manifold
Sound insulation and noise reduction intake manifold assembly.
Background technique
Chinese automobile has a extensive future, and possesses very big market, automobile bring facilitate while, be also accompanied by
Many problems are exactly one of among these noise problem (NVH problem), report according to State Ministry of Environmental Protection, automobile produces in use
Raw noise beautifully has become one of the pollution sources in city environmental pollution problem, no matter automobile is made an uproar with which kind of power source traveling
Mail topic all will be that cannot be neglected critical issue.The noise of automobile not only has an impact to environment, equally to driver comfort with
And the market orientation of product, Consumers' Acceptance have very important influence.
The noise of automobile mainly made an uproar by wind, tire, transmission mechanism, engine etc. generate.The original that different noise sources generates
Manage different, wind is made an uproar mainly in galloping since body accessories generate, such as rearview mirror outstanding, wheel hub, door
Handle etc.；Tire, which is made an uproar mainly, has much relations with traveling road conditions and tire tread structure, and the coarse general tire in road surface is made an uproar larger；Driver
The transmission path that structure is exported as engine power, radiated noise characteristic are related to all components being attached thereto；Engine
Noise is mainly made of combustion noise, mechanical noise and aerodynamic noise etc..Combustion noise refers mainly to cylinder
The noise that interior fuel gas generates when burning finally is propagated in the form of radiated noise；Mechanical noise refers mainly to each machinery
It mainly include piston knock, valve actuating mechanism, gear and bearing etc. due to the noise generated that mutually collides, rubs between component
The noise etc. of generation；Aerodynamic noise refers mainly to the noise due to caused by air relative motion, for vehicle motor
Speech, aerodynamic noise mainly includes intake system noise, exhaust system noise, cooling system noise etc..Studies have shown that right
For any engine handled without sound insulation and noise reduction, exhaust system noise specific gravity is maximum, and intake system noise is only second to arrange
Gas noise, therefore center of gravity is all placed on the sound insulation and noise reduction of exhaust manifold by major research institution, is occurred by years of researches
The method of many exhaust system sound insulation and noise reductions, it is limited that this causes it to optimize improved space.In order to further improve vehicle and hair
The sound insulation and noise reduction characteristic of motivation, the sound insulation and noise reduction of gas handling system just highlight, and gas handling system usually has air-intake air-bleed tube, air
Filter, air induction hose, middle device for cooling and inlet manifold etc. composition, in order to sound insulation and noise reduction usually increase in gas handling system it is humorous
The structures such as vibration chamber, wavelength tube, silencer, this improves the sound insulation and noise reduction characteristic of gas handling system to a certain extent, by for many years
Development it is found that want that the sound insulation and noise reduction characteristic for further decreasing gas handling system is very difficult on the basis of original structure, need
Using high performance material or increase auxiliary device, but this has increased considerably production cost, all big enterprises are being sought
Cheap effective sound insulation and noise reduction mode.Intake system noise not only influences riding comfort, and connects to the market of a vehicle
Had a significant impact by degree, therefore effectively controls and reduce intake system noise and be very necessary.For disappearing for gas handling system
Sound sound insulation value research, everybody is typically concerned with traditional noise reduction method, and the sound insulation and noise reduction of inlet manifold itself and NVH are special
Property at present be almost space state, author based on the invention it is a kind of based on kangaroo tail exploitation automobile-used sound insulation and noise reduction air inlet discrimination
Pipe.
Traditional gas inlet manifold design is beaten mostly without ready patterns to follow, often rule of thumb and arrangement space is designed, this
Cause the design of inlet manifold varied, the cross section of inlet manifold is cylinder and radius is definite value, although designing in this way
Simply, but typically result in the problems such as inflow noise is big, and fuel economy is bad, use for reference Darwinian biological evolution theory we
It was found that kangaroo tail of the function of the inlet manifold of engine similar to animal in the Nature, but animal kangaroo tail through it is too long when
Between evolution, there is advantageous environmental suitability, it has been observed that animal kangaroo tail cross section is never cylinder and half
Diameter is non-definite value, this provides inspiration by the Theoretical Design motor intake manifold of biological evolution for us.
Nature biotechnology passes through evolution in 1 years, has good adaptive capacity to environment, this is the innovation and creation of the mankind
Provide inspiration.Research shows that kangaroo is very small when being born, only about a shelled peanut is so big, and the height for the kangaroo that grows up has
2.6 meters, weight can achieve 50 kilograms.Kangaroo with lower limb beat running speed it is very fast, when 50 kilometers of scooter or more.It is all
Pipe volume is not much for kangaroo, there is a common ground: having strong and strong tail, kangaroo runs to jump generation, tail length 1200-1300
Millimeter, highest can jump to 4 meters, can farthest skip to 13 meters, it may be said that be to jump to obtain the farthest mammal of highest.Most of kangaroos exist
Ground life, kangaroo are balanced in jump process with tail, and when they slowly walk about, tail then can be used as Article 5
Leg.The tail of kangaroo is not only thick but also long, covers with muscle.It can support the body of kangaroo in kangaroo rest, and can be in kangaroo jump
Jumping up, it is faster farther to help kangaroo jump to obtain.
Research shows that long-term biological evolution causes kangaroo when running at a high speed, tail be not only able to provide balanced action and
And windage and damping noise reduction effect with very little, this makes kangaroo have advantageous environmental suitability, this is us
Inspiration is provided by the Theoretical Design motor intake manifold of biological evolution.It will also be appreciated that by observing us regardless of bag
Which kind of shape is rat-tail bar be presented, this do not affect air it is smooth streak kangaroo tail, while there is the noise and wind of very little
Resistance, it is believed that have little influence on any activity of kangaroo, this is based on kangaroo tail for us and develops automobile-used sound insulation and noise reduction air inlet
Manifold provides very big design space, and more cheap approach, and on the other hand, often in contact with ground, this leads kangaroo tail
Kangaroo tail is caused to have the function of good sound insulation and noise reduction, absorbing, antivibration, if not kangaroo can generate very big when walking
Vibrating noise, however actual conditions not in this way.And Bionic Design can allow engine to have more visual impact and aesthetic feeling,
While the distance for the man and nature that can further, getting along amiably and peacefully for man and nature has been annotated to a certain extent.Based on above point
The analysis present invention provides that a kind of structure is simple, moulding streamline, aesthetic in appearance, air resistance coefficient is small, air inlet is smooth, sound insulation and noise reduction, cost
The automobile-used variable curvature of cheap biomimetic type " kangaroo tail " combs inlet manifold, which can improve the fuel economy of automobile, drops
The noise of low engine improves engine radiating performance etc..
Summary of the invention
It is an object of the invention to solve the deficiencies in the prior art, a kind of automobile-used sound insulation and noise reduction air inlet of kangaroo tail is provided
Manifold component.
In order to achieve the above object, the following technical schemes are provided:
A kind of automobile-used sound insulation and noise reduction intake manifold assembly based on kangaroo tail, including inlet manifold and pressure-stabilizing bin, it is described
The inlet end of inlet manifold and outlet side bionical kangaroo tail front-end and back-end cross section curve profile are opened in the exhaust manifold wall
There is upper and lower sound insulation and noise reduction cavity；
Specific manufacturing method:
S1: the sample both ends cross section picture of adult kangaroo tail is obtained by high definition camera, and is filtered out clear-cut
Kangaroo tail both ends cross section picture, to picture after optimization processing, will adult kangaroo tail sample both ends cross section outside
It is equal to obtain the original both ends cross section outer profile of kangaroo tail according to statistical data on graph paper for profile geometrical characteristic Drawing of Curve
For elliptic equation；
S2: the elliptic equation of bionical kangaroo tail cross section curve is limited to ellipse to inlet manifold cross section curve, in order to prolong
Long life reduces processing cost, and facilitates the application of new material that thickness is set as 5mm, and according to inlet manifold
Design standard optimize to obtain that the inlet end cross section elliptical long axis of outer profile is 35mm and short axle is 25mm, contour curve
Equation are as follows:
S3: according to inlet manifold design standard optimize to obtain the outlet side cross section elliptical long axis of outer profile be
20mm, short axle 15mm, contour curve equation are as follows:
S4: determining following parameter in 3 d modeling software and draws and determines that unit is millimeter: single exhaust manifold
Determine: outlet side ellipse central coordinate of circle is O1 (- 174, -500,500), and four extreme coordinates of outlet side ellipse long/short axis are
A1 (- 174, -485,500), B1 (- 154, -500,500), C1 (- 174, -515,500), D1 (- 194, -500,500), outlet
Oval central coordinate of circle and four extreme coordinates of outlet side ellipse long/short axis is held to determine 2.1 institute of contour curve equation of outlet side
In plane；Inlet end ellipse central coordinate of circle is O2 (- 174, -115,0), and four extreme coordinates of inlet end ellipse long/short axis are
A2 (- 174, -115, -25), B2 (- 139, -115,0), C2 (- 174, -115,25), D2 (- 209, -115,0) inlet end are oval
Central coordinate of circle and four extreme coordinates of inlet end ellipse long/short axis determine the 1.1 place plane of contour curve equation of inlet end；
S5: determine guide line: the oval guide line between inlet end ellipse in outlet side is circular arc, and connection outlet side is oval
Guide line extreme coordinates be C1 (- 174, -515,500), connection inlet end ellipse guide line extreme coordinates for A2 (- 174, -
115, -25), radius 466mm carries out curved surface setting-out using outlet side ellipse and inlet end ellipse as contour line；
S6: sound insulation and noise reduction cavity: carrying out the operation of equidistant entity line on the basis of the inner outline of inlet end cross section, equidistantly away from
Sound insulation and noise reduction cavity inner outline is obtained from for outside 2mm, equidistant distance is that outside 3mm obtains sound insulation and noise reduction cavity outer profile
Line, the first cutting line and the second cutting line that angle is 90 degree are to sound insulation and noise reduction cavity inner outline and sound insulation and noise reduction cavity foreign steamer
Profile is cut, and the first cutting line and sound insulation and noise reduction cavity inner outline focus are respectively C, D, and the first cutting line and sound insulation are dropped
Cavity outer contour focus of making an uproar is respectively C1, D1, and the second cutting line and sound insulation and noise reduction cavity inner outline focus are respectively E, F,
Second cutting line and sound insulation and noise reduction cavity outer contour focus are respectively E1, F1, line C and C1, D and D1, E and E1, F and F1,
The closed figure that described C, C1, F1, F are surrounded is upper cavity contour line, and the closed figure that described D, D1, E1, E are surrounded is lower chamber
Contour line carries out stretching excision by track of guide line, obtains sound insulation and noise reduction cavity；
S7: flange: increase flange in the inlet end of inlet manifold and outlet side, flange is integral with inlet manifold, leans on
The flange of nearly inlet end is formed by two concentration ellipses by stretching boss, interior ellipse size and inlet end cross section outer contour
It is identical, and be concentration ellipse；Outer oval and inlet end cross section inner outline is concentration ellipse, elliptic equation 1.2, to above-mentioned
The two oval profiles constituted carry out flange stretch, stretched thickness 5mm, and mounting hole is beaten above, and the position of mounting hole is a left side
The right side, structure symmetrical above and below, bore dia 5mm；
Similarly the outlet side of the inlet manifold increases flange, and principle is with the flange of inlet end, and flange is by two oval stretchings
Boss forms, and is concentration ellipse, and interior ellipse specific size is identical as outlet side cross section inner outline, and is concentration ellipse；
It is outer it is oval be similarly concentration ellipse with outlet side cross section inner outline, elliptic equation 1.3, to the two oval profiles constituted into
Row flange stretch, stretched thickness 5mm, and mounting hole is beaten above, the position of mounting hole is left and right, structure symmetrical above and below, hole
Diameter is 5mm；
S8: multiple exhaust manifolds: single inlet manifold carries out array with the spacing of 116mm, obtains four cylinder engine air inlet
Manifold or three-cylinder engine inlet manifold or six cylinder engine inlet manifold；
S9: pressure-stabilizing bin: the ontology of pressure-stabilizing bin is spheroid shape structure, is formed by ellipse around System of Rotating about Fixed Axis boss, is carried out later
Take out shell processing, pumpings thickness of the shell is 5mm, and the oval center of circle is O3 (0,0,0), four extreme coordinates of oval long/short axis for A3 (0,
80,0) four endpoints of, (250,0,0) B3, C3 (- 250,0,0), D3 (0, -80,0), the oval center of circle and oval long/short axis are sat
Mark determine it is oval where plane, it is oval its plane equation planar:
The oval straight line around point C3 (- 250,0,0) and B3 (250,0,0) connection is rotated, and ellipsoid entity is formed,
5mm is carried out later and takes out shell processing, forms preliminary pressure-stabilizing bin；
S10: air entraining passage: drawing two concentration ellipses in the plane apart from inlet manifold inlet end Flange Plane 20mm, ellipse
Circle central coordinate of circle is E1 (- 174, -90,0), and two elliptical plane equations are respectively 2.2 and 1.1, using two ellipses as profile
Line carries out flange stretch, and draw direction selection is molded into lower one side, carries out using planar elliptical equation shown in formula 1.1 as contour line convex
Platform stretches excision, and tensile elongation, which is subject to, gets through pressure-stabilizing bin ontology and air entraining passage；
S11: air entraining passage flange: increasing flange on pressure-stabilizing bin air entraining passage, and Flange Plane is flat with corresponding intake manifold flange
Face is parallel, is 20mm with corresponding intake manifold flange plan range, and pressure-stabilizing bin air entraining passage flange is stretched convex by two concentration ellipses
Platform forms, and two concentration ellipse central coordinate of circle are E1 (- 174, -90,0), in plane where two concentration ellipses, with formula 1.2 and formula
2.2 bucket wheel profiles carry out flange stretch to the direction close to pressure-stabilizing bin, remaining bleed similarly can be obtained in stretched thickness 5mm
Road；
S12: air inlet: doing three concentration ellipses in the plane parallel with inlet manifold outlet side Flange Plane, oval
Central coordinate of circle is E2 (0,0,90), and equation is shown in formula 2.3, formula 2.4, formula 2.5 respectively；
Flange stretch is carried out at contour line with formula 2.3,2.4 institute of formula, draw direction selection is molded into lower one side, with formula 2.3
Shown planar elliptical equation is that contour line carries out flange stretch excision, and tensile elongation is subject to the thickness for getting through pressure-stabilizing bin ontology,
Flange stretch, stretched thickness 5mm are carried out to close to pressure-stabilizing bin ontology direction at contour line, and beats peace with formula 2.4,2.5 institute of formula
Hole is filled, installation pore radius is 2.5mm, obtains air inlet, and finally obtain whole pressure-stabilizing bin.
S13: the pressure-stabilizing bin and exhaust manifold threedimensional model built up above carry out 3D printing.
The invention has the benefit that
1, bionical kangaroo tail obtains elliptic contour equation, and the whole story both ends diameter for obtaining kangaroo tail differs, diameter
Variation from the coarse to fine, therefore obtains the overall structure of exhaust manifold, the exhaust manifold absorbing of this structure, antivibration, moulding streamline, into
Air-flow is smooth.
2, it is provided with sound insulation and noise reduction cavity up and down in exhaust manifold, reduces the noise of exhaust manifold, perfectly reaches
The function of sound insulation and noise reduction.
Detailed description of the invention
Fig. 1 is intake manifold assembly overall structure diagram；
Fig. 2 is exhaust manifold structure schematic diagram；
Fig. 3 is inlet end end view drawing；
Fig. 4 is inlet end and outlet side outer profile curve and guide line schematic diagram；
Fig. 5 is sound insulation and noise reduction cavity drawing process figure；
Fig. 6 is sound insulation and noise reduction cavity contour line molding figure；
Fig. 7 is pressure-stabilizing bin elliptic coordinates figure.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Middle attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the range of claimed invention, but is merely representative of selected reality of the invention
Apply example.Based on the embodiment of the present invention, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall within the protection scope of the present invention.
A kind of automobile-used sound insulation and noise reduction intake manifold assembly based on kangaroo tail as shown in Figs. 1-3, including inlet manifold 2
With pressure-stabilizing bin 1, the 21 bionical kangaroo tail front-end and back-end cross section curve wheel of inlet end 20 and outlet side of the inlet manifold 2
Exterior feature is provided with sound insulation and noise reduction cavity 201 and lower sound insulation and noise reduction cavity 202 in the exhaust manifold wall；
Specific manufacturing method:
S1: the sample both ends cross section picture of adult kangaroo tail is obtained by high definition camera, and is filtered out clear-cut
Kangaroo tail both ends cross section picture, to picture after optimization processing, will adult kangaroo tail sample both ends cross section outside
It is equal to obtain the original both ends cross section outer profile of kangaroo tail according to statistical data on graph paper for profile geometrical characteristic Drawing of Curve
For elliptic equation；
S2: the elliptic equation of bionical kangaroo tail cross section curve is limited to ellipse to inlet manifold cross section curve, in order to prolong
Long life reduces processing cost, and facilitates the application of new material that thickness is set as 5mm, and according to inlet manifold
Design standard optimize to obtain that the inlet end cross section elliptical long axis of outer profile is 35mm and short axle is 25mm, contour curve
Equation are as follows:
S3: according to inlet manifold design standard optimize to obtain the outlet side cross section elliptical long axis of outer profile be
20mm, short axle 15mm, contour curve equation are as follows:
S4: determining following parameter in 3 d modeling software and draws and determines that unit is millimeter: single exhaust manifold
Determine: outlet end ellipse central coordinate of circle as shown in Figure 3 is O1 (- 174, -500,500), four ends of outlet side ellipse long/short axis
Point coordinate be A1 (- 174, -485,500), B1 (- 154, -500,500), C1 (- 174, -515,500), D1 (- 194, -500,
500), outlet side ellipse central coordinate of circle and four extreme coordinates of outlet side ellipse long/short axis determine the contour curve of outlet side
2.1 place plane of equation；Inlet end ellipse central coordinate of circle is O2 (- 174, -115,0), four ends of inlet end ellipse long/short axis
Point coordinate be A2 (- 174, -115, -25), B2 (- 139, -115,0), C2 (- 174, -115,25), D2 (- 209, -115,0) into
Gas end ellipse central coordinate of circle and four extreme coordinates of inlet end ellipse long/short axis determine the contour curve equation 1.1 of inlet end
Place plane；
S5: determine guide line: the oval guide line between inlet end ellipse in outlet side is circular arc, and connection outlet side is oval
Guide line extreme coordinates be C1 (- 174, -515,500), connection inlet end ellipse guide line extreme coordinates for A2 (- 174, -
115, -25), radius 466mm carries out curved surface setting-out using outlet side ellipse and inlet end ellipse as contour line；
S6: it sound insulation and noise reduction cavity: is carried out on the basis of inlet end cross section inner outline 30 as shown in Figure 5 and Figure 6 equidistant
The operation of entity line, equidistant distance are that outside 2mm obtains sound insulation and noise reduction cavity inner outline 31, and equidistant distance is that outside 3mm is obtained
Sound insulation and noise reduction cavity outer contour 32, the first cutting line C1D1 and the second cutting line E1F1 that angle is 90 degree are to sound insulation and noise reduction chamber
Internal contour line 31 and sound insulation and noise reduction cavity outer contour 32 are cut, the first cutting line C1D1 and sound insulation and noise reduction cavity lubrication groove
31 focus of profile is respectively C, D, and the first cutting line C1D1 and 32 focus of sound insulation and noise reduction cavity outer contour are respectively C1, D1, the
Two cutting line E1F1 and 31 focus of sound insulation and noise reduction cavity inner outline are respectively E, F, the second cutting line E1F1 and sound insulation and noise reduction chamber
Internal 31 focus of contour line is respectively E1, F1, and line C is with C1, D and D1, E and E1, F and F1, the envelope that described C, C1, F1, F are surrounded
Closing figure is upper cavity contour line, and the closed figure that described D, D1, E1, E are surrounded is lower chamber contour line, using guide line as track
Stretching excision is carried out, sound insulation and noise reduction cavity is obtained；
S7: flange: increase flange in the inlet end of inlet manifold and outlet side, flange is integral with inlet manifold, leans on
The flange of nearly inlet end is formed by two concentration ellipses by stretching boss, interior ellipse size and inlet end cross section outer contour
It is identical, and be concentration ellipse；Outer oval and inlet end cross section inner outline is concentration ellipse, elliptic equation 1.2, to above-mentioned
The two oval profiles constituted carry out flange stretch, stretched thickness 5mm, and mounting hole is beaten above, and the position of mounting hole is a left side
The right side, structure symmetrical above and below, bore dia 5mm；
Similarly the outlet side of the inlet manifold increases flange, and principle is with the flange of inlet end, and flange is by two oval stretchings
Boss forms, and is concentration ellipse, and interior ellipse specific size is identical as outlet side cross section inner outline, and is concentration ellipse；
It is outer it is oval be similarly concentration ellipse with outlet side cross section inner outline, elliptic equation 1.3, to the two oval profiles constituted into
Row flange stretch, stretched thickness 5mm, and mounting hole is beaten above, the position of mounting hole is left and right, structure symmetrical above and below, hole
Diameter is 5mm；
S8: multiple exhaust manifolds: single inlet manifold carries out array with the spacing of 116mm, obtains four cylinder engine air inlet
Manifold or three-cylinder engine inlet manifold or six cylinder engine inlet manifold；
S9: pressure-stabilizing bin: the ontology of pressure-stabilizing bin is spheroid shape structure, is formed by ellipse around System of Rotating about Fixed Axis boss, is carried out later
Take out shell processing, pumpings thickness of the shell is 5mm, and the oval center of circle is O3 (0,0,0), four extreme coordinates of oval long/short axis for A3 (0,
80,0) four endpoints of, (250,0,0) B3, C3 (- 250,0,0), D3 (0, -80,0), the oval center of circle and oval long/short axis are sat
Mark determine it is oval where plane, it is oval its plane equation planar:
The oval straight line around point C3 (- 250,0,0) and B3 (250,0,0) connection is rotated, and ellipsoid entity is formed,
5mm is carried out later and takes out shell processing, forms preliminary pressure-stabilizing bin；
S10: air entraining passage: drawing two concentration ellipses in the plane apart from inlet manifold inlet end Flange Plane 20mm, ellipse
Circle central coordinate of circle is E1 (- 174, -90,0), and two elliptical plane equations are respectively 2.2 and 1.1, using two ellipses as profile
Line carries out flange stretch, and draw direction selection is molded into lower one side, carries out using planar elliptical equation shown in formula 1.1 as contour line convex
Platform stretches excision, and tensile elongation, which is subject to, gets through pressure-stabilizing bin ontology and air entraining passage；
S11: air entraining passage flange: increasing flange on pressure-stabilizing bin air entraining passage, and Flange Plane is flat with corresponding intake manifold flange
Face is parallel, is 20mm with corresponding intake manifold flange plan range, and pressure-stabilizing bin air entraining passage flange is stretched convex by two concentration ellipses
Platform forms, and two concentration ellipse central coordinate of circle are E1 (- 174, -90,0), in plane where two concentration ellipses, with formula 1.2 and formula
2.2 bucket wheel profiles carry out flange stretch to the direction close to pressure-stabilizing bin, remaining bleed similarly can be obtained in stretched thickness 5mm
Road；
S12: air inlet: doing three concentration ellipses in the plane parallel with inlet manifold outlet side Flange Plane, oval
Central coordinate of circle is E2 (0,0,90), and equation is shown in formula 2.3, formula 2.4, formula 2.5 respectively；
Flange stretch is carried out at contour line with formula 2.3,2.4 institute of formula, draw direction selection is molded into lower one side, with formula 2.3
Shown planar elliptical equation is that contour line carries out flange stretch excision, and tensile elongation is subject to the thickness for getting through pressure-stabilizing bin ontology,
Flange stretch, stretched thickness 5mm are carried out to close to pressure-stabilizing bin ontology direction at contour line, and beats peace with formula 2.4,2.5 institute of formula
Hole is filled, installation pore radius is 2.5mm, obtains air inlet, and finally obtain whole pressure-stabilizing bin.
S13: the pressure-stabilizing bin and exhaust manifold threedimensional model built up above carry out 3D printing.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. a kind of automobile-used sound insulation and noise reduction intake manifold assembly based on kangaroo tail, which is characterized in that including inlet manifold and surely
Press storehouse, the inlet end of the inlet manifold and outlet side bionical kangaroo tail front-end and back-end cross section curve profile, the exhaust
Sound insulation and noise reduction cavity up and down is provided in manifold wall；
Specific manufacturing method:
S1: the sample both ends cross section picture of adult kangaroo tail is obtained by high definition camera, and filters out clear-cut bag
Rat-tail bar both ends cross section picture, to picture after optimization processing, by kangaroo tail sample both ends cross section outer profile of growing up
For geometrical characteristic Drawing of Curve on graph paper, it is ellipse for obtaining the original both ends cross section outer profile of kangaroo tail according to statistical data
Equation of a circle；
S2: the elliptic equation of bionical kangaroo tail cross section curve is limited to ellipse to inlet manifold cross section curve, makes to extend
With the service life, processing cost is reduced, and facilitates the application of new material that thickness is set as 5mm, and setting according to inlet manifold
Meter standard optimizes to obtain that the inlet end cross section elliptical long axis of outer profile is 35mm and short axle is 25mm, contour curve equation
Are as follows:
S3: the design standard according to inlet manifold optimizes to obtain the elliptical long axis of outlet side cross section outer profile to be 20mm,
Short axle is 15mm, contour curve equation are as follows:
S4: determining following parameter in 3 d modeling software and draws and determines that unit is millimeter: the determination of single exhaust manifold:
Outlet side ellipse central coordinate of circle is O1 (- 174, -500,500), four extreme coordinates of outlet side ellipse long/short axis be A1 (-
174, -485,500), (- 154, -500,500) B1, C1 (- 174, -515,500), D1 (- 194, -500,500), outlet side is ellipse
Circle central coordinate of circle and four extreme coordinates of outlet side ellipse long/short axis are put down where determining the contour curve equation 2.1 of outlet side
Face；Inlet end ellipse central coordinate of circle is O2 (- 174, -115,0), four extreme coordinates of inlet end ellipse long/short axis be A2 (-
174, -115, -25), (- 139, -115,0) B2, C2 (- 174, -115,25), D2 (- 209, -115,0) inlet end ellipse center of circle
Coordinate and four extreme coordinates of inlet end ellipse long/short axis determine the 1.1 place plane of contour curve equation of inlet end；
S5: determine guide line: the oval guide line between inlet end ellipse in outlet side is circular arc, connection outlet side ellipse guidance
Line endpoints coordinate be C1 (- 174, -515,500), connection inlet end ellipse guide line extreme coordinates for A2 (- 174, -115, -
25), radius 466mm carries out curved surface setting-out using outlet side ellipse and inlet end ellipse as contour line；
S6: sound insulation and noise reduction cavity: carrying out equidistant entity line operation on the basis of the inner outline of inlet end cross section, and equidistant distance is
Outside 2mm obtains sound insulation and noise reduction cavity inner outline, and equidistant distance is that outside 3mm obtains sound insulation and noise reduction cavity outer contour, presss from both sides
The first cutting line and the second cutting line that angle is 90 degree are to sound insulation and noise reduction cavity inner outline and sound insulation and noise reduction cavity outer contour
It is cut, the first cutting line and sound insulation and noise reduction cavity inner outline focus are respectively C, D, the first cutting line and sound insulation and noise reduction chamber
External profile line focus is respectively C1, D1, and the second cutting line and sound insulation and noise reduction cavity inner outline focus are respectively E, F, and second
Cutting line and sound insulation and noise reduction cavity outer contour focus are respectively E1, F1, line C and C1, D and D1, E and E1, F and F1, described
C, the closed figure that C1, F1, F are surrounded is upper cavity contour line, and the closed figure that described D, D1, E1, E are surrounded is lower chamber profile
Line carries out stretching excision by track of guide line, obtains sound insulation and noise reduction cavity；
S7: flange: increasing flange in the inlet end of inlet manifold and outlet side, and flange is integral with inlet manifold, it is close into
The flange at gas end is formed by two concentration ellipses by stretching boss, interior ellipse size and inlet end cross section outer contour phase
It together, and is concentration ellipse；Outer oval and inlet end cross section inner outline is concentration ellipse, elliptic equation 1.2, to above-mentioned two
The profile that ellipse is constituted carries out flange stretch, stretched thickness 5mm, and mounting hole is beaten above, and the position of mounting hole is left and right,
Structure symmetrical above and below, bore dia 5mm；
Similarly the outlet side of the inlet manifold increases flange, and principle is with the flange of inlet end, and flange is by two oval stretching boss
It forms, and is concentration ellipse, interior ellipse specific size is identical as outlet side cross section inner outline, and is concentration ellipse；It is outer ellipse
Round to be similarly concentration ellipse with outlet side cross section inner outline, elliptic equation 1.3 carries out the two oval profiles constituted convex
Platform stretches, stretched thickness 5mm, and mounting hole is beaten above, and the position of mounting hole is left and right, structure symmetrical above and below, bore dia
For 5mm；
S8: multiple exhaust manifolds: single inlet manifold carries out array with the spacing of 116mm, obtains four cylinder engine inlet manifold
Or three-cylinder engine inlet manifold or six cylinder engine inlet manifold；
S9: pressure-stabilizing bin: the ontology of pressure-stabilizing bin is spheroid shape structure, is formed by ellipse around System of Rotating about Fixed Axis boss, carries out pumping shell later
Processing, pumping thickness of the shell are 5mm, and the oval center of circle is O3 (0,0,0), and four extreme coordinates of oval long/short axis are A3 (0,80,0),
Four extreme coordinates of B3 (250,0,0), C3 (- 250,0,0), D3 (0, -80,0), the oval center of circle and oval long/short axis determine
Plane where oval, it is oval its plane equation planar:
The oval straight line around point C3 (- 250,0,0) and B3 (250,0,0) connection is rotated, and forms ellipsoid entity, later
It carries out 5mm and takes out shell processing, form preliminary pressure-stabilizing bin；
S10: two concentration ellipses, ellipse circle air entraining passage: are drawn in the plane apart from inlet manifold inlet end Flange Plane 20mm
Heart coordinate is E1 (- 174, -90,0), and two elliptical plane equations are respectively 2.2 and 1.1, using two ellipses as contour line into
Row flange stretch, draw direction selection are molded into lower one side, carry out boss drawing by contour line of planar elliptical equation shown in formula 1.1
Excision is stretched, tensile elongation, which is subject to, gets through pressure-stabilizing bin ontology and air entraining passage；
S11: air entraining passage flange: increasing flange on pressure-stabilizing bin air entraining passage, and Flange Plane is flat with corresponding intake manifold flange plane
Row is 20mm with corresponding intake manifold flange plan range, pressure-stabilizing bin air entraining passage flange by two concentration ellipses stretching boss and
At two concentration ellipse central coordinate of circle are E1 (- 174, -90,0), in plane where two concentration ellipses, with formula 1.2 and 2.2 institute of formula
Bucket wheel profile carries out flange stretch to the direction close to pressure-stabilizing bin, remaining air entraining passage similarly can be obtained in stretched thickness 5mm；
S12: three concentration ellipses, the oval center of circle air inlet: are done in the plane parallel with inlet manifold outlet side Flange Plane
Coordinate is E2 (0,0,90), and equation is shown in formula 2.3, formula 2.4, formula 2.5 respectively；
Flange stretch is carried out at contour line with formula 2.3,2.4 institute of formula, draw direction selection is molded into lower one side, shown in formula 2.3
Planar elliptical equation is that contour line carries out flange stretch excision, and tensile elongation is subject to the thickness for getting through pressure-stabilizing bin ontology, with formula
2.4,2.5 institute of formula carries out flange stretch, stretched thickness 5mm to close to pressure-stabilizing bin ontology direction at contour line, and beats mounting hole,
Installation pore radius is 2.5mm, obtains air inlet, and finally obtain whole pressure-stabilizing bin.
S13: the pressure-stabilizing bin and exhaust manifold threedimensional model built up above carry out 3D printing.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29708768U1 (en) * | 1997-05-16 | 1998-09-10 | Heinrich Gillet Gmbh & Co Kg, 67480 Edenkoben | Exhaust pipe for internal combustion engines |
| GB2371334B (en) * | 2001-01-17 | 2005-08-10 | Sankei Giken Kogyo Kk | Engine exhaust system |
| CN102588059A (en) * | 2012-02-08 | 2012-07-18 | 西安理工大学 | Bionic principle based design method of exhaust manifold of automobile engine |
| CN204082292U (en) * | 2014-09-24 | 2015-01-07 | 长春工程学院 | The automobile gas exhausting manifold branch of Biomimetic Fish dermatoglyph internal surface |
| CN106815435A (en) * | 2017-01-18 | 2017-06-09 | 吉林大学 | A kind of preparation method of biomimetic type automobile tail fin shell |
-
2019
- 2019-03-29 CN CN201910250247.1A patent/CN109899191B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29708768U1 (en) * | 1997-05-16 | 1998-09-10 | Heinrich Gillet Gmbh & Co Kg, 67480 Edenkoben | Exhaust pipe for internal combustion engines |
| GB2371334B (en) * | 2001-01-17 | 2005-08-10 | Sankei Giken Kogyo Kk | Engine exhaust system |
| CN102588059A (en) * | 2012-02-08 | 2012-07-18 | 西安理工大学 | Bionic principle based design method of exhaust manifold of automobile engine |
| CN204082292U (en) * | 2014-09-24 | 2015-01-07 | 长春工程学院 | The automobile gas exhausting manifold branch of Biomimetic Fish dermatoglyph internal surface |
| CN106815435A (en) * | 2017-01-18 | 2017-06-09 | 吉林大学 | A kind of preparation method of biomimetic type automobile tail fin shell |
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